Kyle is camping in the mount hood national forest, oregon. his campsite is in a wide, u-shaped valley. the valley was most likely formed by
1)a river
2)mass wasting
3)a glacier
4)a mudflow

The wings of insects, birds, and bats evolved independently but carry out similar functions. this is an example of a. analogous structures. b. embryonic structures. c. vestigial structures. d. homologous structures.

Which process in respiration happens first? a)pyruvate processing b)electron transport chain c)krebs cycle d)glycolysis

Which term most precisely describes the cellular process of breaking down large molecules into smaller ones? a) catalysis b) metabolism c) anabolism d) dehydration e) catabolism